Emikhakheni yokuqapha amanzi, ukugeleza kwamanzi emadolobheni, kanye nokuxwayisa ngezikhukhula, ukulinganisa ngokunembile nangokuthembekile ukugeleza eziteshini ezivulekile (njengemifula, imisele yokunisela, kanye namapayipi okukhipha amanzi) kubalulekile. Izindlela zokulinganisa izinga lamanzi zendabuko zivame ukudinga ukuthi izinzwa zicwiliswe...
Funda kabanzi